switch>enable
switch#configure terminal
Jun 1 2023 10:40:38 switch MPU0 %SHELL-CONFIG_IN-5: Enter configuration commands, One per line. End with CNTL+Z.
switch(config)#int tengigabitethernet 0/29
switch(config-if-tengigabitethernet0/29)#speed ?
  10             10M
  100            100M
  1000           1000M(1G)
  10000          10000M(10G)
  100000         100000M (100G)
  25000          25000M(25G)
  40000          40000M (40G)
  auto           Auto-negotiation

switch(config-if-tengigabitethernet0/29)#speed 1000
switch(config-if-tengigabitethernet0/29)#exit
switch(config)#exit